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प्रश्न
The horizontal rows in a periodic table are called _____.
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उत्तर
The horizontal rows in a periodic table are called periods.
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संबंधित प्रश्न
On the basis of electronic configuration, how will you identify chemically similar elements?
Consider the following elements:
20Ca, 8O, 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be:
(i) very stable?
(ii) in group 2 of the periodic table?
(iii) in group 16 of the periodic table?
Name two elements in each case:
Transition element
Write a short note.
Structure of the modern periodic table.
Give the symbol and valency of the following element and radical.
Calcium
Give the symbol and valency of the following element and radical.
Hydroxide
Give the symbol and valency of the following element and radical.
Carbonate
Write a scientific reason.
There was ambiguity about the correct position of hydrogen in Mendeleev’s periodic table.
What is the symbol of the element Tungsten?
The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?
